Update git submodules

* Update helpcontent2 from branch 'libreoffice-7-0'
  to 25d7c849c5f6159cae78b11be63445c548de29eb
  - (func_networkdays.intl.xhp) Include square brackets in syntax section to indicate optional parameters.
    
    Note: Exact configuration of square brackets based on that for NETWORKDAYS().
    
    Change-Id: I0f1f7100add3f50d2ba3946087cca292d7a51d65
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/95204
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    (cherry picked from commit 1637dffb6225234b599ee586c796fd6924aecf8a)
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/95724
    Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index c1fbeca..25d7c849 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit c1fbeca7942fbc48b7857e7be079de506cfd7deb
Subproject commit 25d7c849c5f6159cae78b11be63445c548de29eb